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  • Re: Does anybody know what kind of Apple Board this is?

    From Gordon Aplin@gordon.aplin@gmail.com to comp.sys.apple2 on Tue Oct 3 09:43:14 2023
    From Newsgroup: comp.sys.apple2

    On Thursday, August 3, 2023 at 10:07:42 AM UTC-4, Peter 'Shaggy' Haywood wrote:
    Groovy hepcat Thomas Kotowski was jivin' in comp.sys.apple2 on Thu, 3
    Aug 2023 04:17 am. It's a cool scene! Dig it.
    I have an 14” x 8.5” Apple 6502 Circuit board. It has an Apple Logo, with 1978 under logo. It has 3 rows of 8 8040016 16K DRAM, 8 ROM
    chips, a backplane with 8 (not 7) card connectors, arrows drawn
    between the connectors, rows labeled A- K from bottom up, a 2N3904 transistor next to the Color Trim Cap, but no prototyping area. I
    think it may be a replica. Any thoughts?
    Sounds like an original Apple II or II+ motherboard. I haven't seen
    one of these "in the flesh", only in pictures, so I'm not sure whether that's what you have there. But it certainly sounds like one of these.
    The Apple II came out in '77, and I think the II+ came out in '78, so
    this is likely a II+.

    --


    ----- Dig the NEW and IMPROVED news sig!! -----


    -------------- Shaggy was here! ---------------
    Ain't I'm a dawg!!
    Does it have memory configuration jumper blocks on the left side at the end of each row of RAM chips? If so it is likely a II. The ||+ did away with the jumper blocks and hardwired them for 16K RAM chips. Some of the early ||+ machines continued to use the older revision mother board with the blocks. The ||+ came with 16, 32, or 48K RAM for this reason while the II could have any combination of 4K and 16K rows. It had to do with the price of one 16K chip dropping in price to below what 4 4K chips would cost about the time the + came out.
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  • From Michael J. Mahon@mjmahon@aol.com to comp.sys.apple2 on Wed Oct 4 19:52:22 2023
    From Newsgroup: comp.sys.apple2

    Gordon Aplin <gordon.aplin@gmail.com> wrote:
    On Thursday, August 3, 2023 at 10:07:42 AM UTC-4, Peter 'Shaggy' Haywood wrote:
    Groovy hepcat Thomas Kotowski was jivin' in comp.sys.apple2 on Thu, 3
    Aug 2023 04:17 am. It's a cool scene! Dig it.
    I have an 14” x 8.5” Apple 6502 Circuit board. It has an Apple Logo, >>> with 1978 under logo. It has 3 rows of 8 8040016 16K DRAM, 8 ROM
    chips, a backplane with 8 (not 7) card connectors, arrows drawn
    between the connectors, rows labeled A- K from bottom up, a 2N3904
    transistor next to the Color Trim Cap, but no prototyping area. I
    think it may be a replica. Any thoughts?
    Sounds like an original Apple II or II+ motherboard. I haven't seen
    one of these "in the flesh", only in pictures, so I'm not sure whether
    that's what you have there. But it certainly sounds like one of these.
    The Apple II came out in '77, and I think the II+ came out in '78, so
    this is likely a II+.

    --


    ----- Dig the NEW and IMPROVED news sig!! -----


    -------------- Shaggy was here! ---------------
    Ain't I'm a dawg!!

    Does it have memory configuration jumper blocks on the left side at the
    end of each row of RAM chips? If so it is likely a II. The ||+ did away
    with the jumper blocks and hardwired them for 16K RAM chips. Some of the early ||+ machines continued to use the older revision mother board with
    the blocks. The ||+ came with 16, 32, or 48K RAM for this reason while
    the II could have any combination of 4K and 16K rows. It had to do with
    the price of one 16K chip dropping in price to below what 4 4K chips
    would cost about the time the + came out.


    Also, all Apple II’s and II+’s had SIX ROM sockets, not eight. Clones imitated a lot, but I never saw one with a (counterfeit) Apple logo/label.
    --
    -michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
    --- Synchronet 3.20a-Linux NewsLink 1.114